The 64-year-old 26-adult -Hours of sleep at a reasonable hour is 7-9. -Can sleep less than 8 hours is about 1 hour (6 hours) -Can sleep up to 9 hours approximately 1 hour (10 hours)
Adults aged 26-64 years - is the optimal hours of sleep 7-9 hours - can sleep less than seven hours, about 1 hour (6 hours) - can sleep more than nine hours, about 1 hour (10 hours).
- hours of sleep is the most suitable 7-9 H - can sleep less than 7 hours approximately 1 hours. (6 hours) - can sleep more than 9 hours approximately 1 hours (10 hours) .